Make sure the fix doesn't break IE

Changed bot.action.clear so it still explicitly raise Blur event on IE.
Modified test case testClearingANonEmptyElement to assert blur event is
raised exactly once after bot.action.clear is called.

Signed-off-by: Alexei Barantsev <barancev@gmail.com>

javascript/atoms/action.js

@@ -98,6 +98,9 @@ bot.action.clear = function(element) {
       element.value = '';
     }
     bot.events.fire(element, bot.events.EventType.CHANGE);
+    if (goog.userAgent.IE) {
+      bot.events.fire(element, bot.events.EventType.BLUR);
+    }
     var body = bot.getDocument().body;
     if (body) {
       bot.action.LegacyDevice_.focusOnElement(body);

javascript/atoms/test/action_test.html

@@ -56,6 +56,9 @@
           });
     }
 
+    var expectBlurEvent = goog.partial(expectEvent,
+        goog.events.EventType.BLUR);
+
     var expectChangeEvent = goog.partial(expectEvent,
         goog.events.EventType.CHANGE);
 
@@ -68,6 +71,9 @@
           count, counts[eventType]);
     }
 
+    var assertBlurFired = goog.partial(assertEventFired,
+        goog.events.EventType.BLUR);
+
     var assertChangeFired = goog.partial(assertEventFired,
         goog.events.EventType.CHANGE);
 
@@ -113,8 +119,10 @@
         e.value = 'foobar';
         e.disabled = false;
         e.readOnly = false;
+        expectBlurEvent(e);
         expectChangeEvent(e);
         bot.action.clear(e);
+        assertBlurFired();
         assertChangeFired();
         assertEquals('', e.value);
       });